Patent · US Active

Lead-free piezoelectric material

US8182713B2 · kind B2 · utility

20Cited by

5References

3Claims

0Family size

Assignee

NATIONAL INSTITUTE FOR MATERIALS SCIENCE · JP

Inventors

Ren Xiaobing · Tsukuba, JP
Liu Wenfeng · Tsukuba, JP

Key dates

Filing date	Mar 10, 2009
Grant date	May 22, 2012
Priority date	—
Expiry date	Mar 10, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/80
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

There is provided a lead-free piezoelectric material capable of showing a high piezoelectric coefficient (d33>500 pC/N) exceeding that of soft PZT. The lead-free piezoelectric material contains no toxic element such as Pb, comprising a pseudo-binary solid solution of {[(Ba1-x1M1x1)((Ti1-xZrx)1-y1N1y1)O3]-δ%[(Ba1-yCay)1-x2M2x2)(Ti1-y2N2y2)O3]} (wherein M1, N1, M2 and N2 represent an additive element)(abbreviated as BZT-δ% BCT).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.